Relief print.



I. D. HURLBUT.

RELIEF PRINT.

APPLICATION FILED 00-127, 1912.

Patented Dec. 30, 1913.

wi bmeooeo W g. m 5m 55% M I UNITED STATES PATENT OFFICE.

IRA D. HURLBUT, 0F PRAIRIEDU CHIEN, WISCONSIN.

. RELIEF PRINT.

T 0 all whom it may concern:

Be it known that I, IRA D. HURLBUT, a citizen of the United btates, residing at Prairie du Chien, in the county ofCrawford and State of Wisconsimthave invented certain new and useful Improvements in Rel ef Prints, of which the following is a specification; i

My invent-ion relatest-othe art of printbut they are, as stated in theiatter patent,

merely varnished prints? having a very flat surface of equal thickness throughout the area as shown. in the drawing accompanying said patent to C'rump and which he states in his specification is of greatlyexaggerated thickness. Such prints do not give the relief effects produced by steel dies which are cut in depths proportionate in thickness to the lines and fashioned to finish the relief with a rounded surface.

My invention is a relief print having a steel die effect with a rounded surface. This I accomplish by the use of the resins of gums of commerce, such as gum elemi, in granules of varying sizes according to the style and character of the letters or design.

The essential feature of my invention is the use of resinous gums in granular form, and I prefer to use the resin of gum elemi because of its especially high surface tension which produces in the finished product a converging center having the appearance and contour of emboss printby steel dies.

In producing my invention I associate the resin of the gum with saccharine matter and printers ink from which the greater part of the oily content has been removed, as hereinafter fully set forth.

In the accompanying drawings illustrating the various steps in carrying out my invention: Figure 1 shows the desigih-in ink, Fig. 2 the granular composition of gum and saccharine matter in place on the design, Fig. 3 subjecting the same to the action of Specification of Letters Patent. l

Patented Dec. 30, 1913.

t Application filed October 7, 1912. Serial No. 724,354.

I heat, Fig. 4 a completed production, and

Fig.5 is a sectional View, on the line 5-5 of Fig. 4, showing the elevationand configuration of the emboss or imposed matter;

In carrying out my'invention- I impress or print the letters or design desired ont-he paper or other material, in any well known manner from type or relief plate, with ink carefully prepared by the removal of the oils until there is a minimum content of oil and a maximum content of drier consistent with proper distribution and color, andbefore "the ink forming the impression'has dried Iapply thereto in granular form, the composltlon of gum and saccharinematter thatforms the relief or emboss, and then complete the production by subjectingit to heat action'sufiicient to fuse the granules;

In preparing the composition of gum and saccharine matter I take the gum, preferably the gum elemi ofcommerce which is a soft, plastic aggregate consisting of resin combined with oil and sap, and remove by the application of heat, or in any suitable manner, the sap and greater portion of the oil, the resultant being a flexibly frangible substance principally resinous, with some of the characteristics of rubber. To this re sultant I add saccharine matter, preferably in the form of candied honey, from 1 to 25 per cent. according to its character or crystallization' This mixture of resin and saccharine matter is ground into granules yarying in size from the smallest which will not pass through No. 8 bolt cloth and the largest which will pass through No. 50 strainer cloth. Particles that will pass through a dust sieve will not produce a relief effect that would be apparent to the eye or touch, but simply a'fiat varnished surface, and are therefore useless. for the purpose of my invention, but within the limits of practicability particles larger than the maximum stated may be employed for in practice the granules are adapted in size to the strength of the lines of the design or ink base; the smaller granules to the smaller lines and the larger granules to the larger or stronger lines.

The composition forming the relief having been applied to the impression or design while still wet by pouring it thereon in any desired manner and the excess not adhering to the design being removed by striking the printed matter on edge or. otherwise, t

' he printed matter is subjected to a heat temperature sufiicient to cause the granules to fuse or run together without injurin the production or causing a flow beyon the elimiting lines of the base or producing a false effect.

When the composition has become properly fused, it is allowed to cool, and thereupon becomes a finished product-the surface of which is rounded and glossy and resembles steel die emboss work.

In the. process of fusing the pigment of the ink and the drier contained therein becomeincorporated with the composition, the pi ent serving to give the composition the cd or of the printed design, while the drier causes the composition to quickly set and harden, so that the finished productshown F .4, is available for immediate use. If a. big er coloring than that produced by the pigment in the ink is desired the composition maybe colored by a pigment while being prepared, and if an illuminated product 1s desired gold, copper, aluminum or other metallic powder may be applied to the granules in quantity suflicient to adhere.

thereto without allowing much free metallic powder in the aggregate. When the composition to which a metallic powder has been added, as above described, is used the metallic owder appears Wholly on the surface of tiie finished product in a thin layer of metal, the effect being a very close imitation of an illuminated product of the die stamp and allied methods.

Having thus described my invention what Iclaimisr o .1

1. The combination of a sheet of paper or other fabric having anink imprint thereon, and a solid relief mass having a flat base and a convex surface; said base being super imposed on the ink imprlnt and co-extensive with the limits thereof.

V 2. A solid rel1ef"mass comprising an 1ncrustatlon on an' nk mpresslon on a sheet of paper or other fabric; said incrustation lVitnessesz ANNA J. DO GLAS, H. B. DICKINSON.

IRA HURLBUT. v 

